NC 5 days in and struggling

It’s only been 5 days of NC and today’s not been great. I find myself thinking of her a lot and thinking if she’s thinking of me or even misses me. I know 5 days isn’t a lot as I’m aiming for 25-30 but it’s taken its toll so far. I know if I message now or too soon it will only end badly as she said she needs space and to leave her ‘for a bit’. How long even is ‘a bit’!! I’m also overthinking every scenario in my head like: when I do message she’ll just say she’s done and therefore won’t give me the time of day to talk, that there’s Somone else she’s talking to that’s more than just A friend and that she’s not missed me at all. Only thing keeping me sane and positive is that I know she loves me